Well, all I can say is good luck, I think I've killed all those plants...maybe more than once, lol. Crypt parva, I still have some, but dang it's slow growing & only half of 30+ lived. Still, my plant clubbers were impressed at how well mine was doing last year...but not so many now...sniff. They were part of an experiment I tried. Some were in Turface with osmocote, some old Amazonia soil mud (also w/osmocote) & some with Palm & fern sticks in Turface. I didn't see a difference, I lost some of all, but some also grew well.
CO2, of course, will help a lot, as will better ferts than I usually do...